In Japanese there are 3 groups with very few irregular verbs.
First there is group III: the irregulars which are 2, so very few.
| くる (kuru) | きます (kimasu) |
| する(suru) | します (shimasu) |
Next we have the group II: Ichidan are all verbs ending in -eru or having only one syllable before the る (ru). For those, you must remove the final る and replace it with the ending
| たべる (taberu) | たべます (tabe< b>masu) |
| みる (miru) | みます (mimasu) |
There are, however, exceptions such as kaeru (to return), hashiru (to run) or even taberu (to eat) which are from group I.
Group I: the godan include all other verbs, here is an example for each ending.
| かう (kau) | かいます (kaimasu) |
| かく (kaku) | かきます (kakimasu) |
| はなす (hanasu) | はなします (hanashimasu) |
| かつ (katsu) | かちます (kachimasu) |
| しぬ (shinu) | しにます (shinimasu) |
| のむ (nomu) | のみます (nomimasu) |
| あそぶ (asobu) | あそびます (asobimasu) |
| およぐ (oyogu) | およぎます (oyogimasu) |
| わかる (wakaru) | わかります (wakarimasu) |